class StringBufEx3 {
	public static void main(String[] args) {
		StringBuffer sb1 = new StringBuffer("Sun-Ae");
		StringBuffer sb2 = sb1.append("& Kyung-JU");

		sb2.insert(6, " &Yun-A");
		String msg = sb1.toString();
		System.out.println("sb1" + msg);
	}
}
